Ggtcf

How to set preference $ErrorView = "CategoryView" before start powershell.exe ?

powershell.exe -command "$ErrorView = "CategoryView" ; dir wrong.txt" doesnt work.

your code has a serious error in it. you used 4 double quotes instead of two on the outside and a pair of single quotes on the inside. [grin]

this works ...

powershell.exe -command "$ErrorView = 'CategoryView' ; dir wrong.txt; pause"

remove the pause when you are certain things are working as needed. [grin]

To complement Lee Dailey's helpful answer: As Lee points out, your primary problem is that you neglected to escape the " chars. embedded in your overall "..." command.

Assuming that you're calling your command from outside of PowerShell, such as from cmd.exe (Command Prompt):

• Using embedded single-quoting ('...') in lieu of the embedded "..." is an option in this case, as shown in Lee's answer, because CategoryView is to be treated as a literal string.
  
  Using ' for the embedded quoting conveniently obviates the need for escaping.



• 
  

  However, in cases where the embedded string contains variable references (e.g., $var) or expressions (e.g, $(Get-Date)), use of a double-quoted string ("...") is a must, because only double-quoted strings are expandable (interpolated). Escaping the embedded " as " is then a must.

  
  
  
  • Note that, by contrast, inside PowerShell " chars. must be escaped as `".
  
  

# From cmd.exe, for instance.
C:>powershell.exe -command "$ErrorView = "CategoryView"; dir wrong.txt" 

If, for some reason, you must invoke another PowerShell instance from within PowerShell, use a script block ( ... ), which also obviates the need for escaping (and better integrates with the calling session by returning objects from the invocation, not just strings).

# From Powershell.
PS> powershell.exe -command $ErrorView = "CategoryView" ; dir wrong.txt